Ive got 2 thermostats hooked up to 2 heat pump style AC units at my house. Over the weekend I impressed myself and installed a Lyric thermostat to replace a broken thermostat (on the inside of my house) to one of the AC units. It went so easily, I want to replace the other, probably with a Lyric T5.
In any case, the one I did, the wiring was a pretty simple, one to one relationship, where I could match most things, but it did take a few trips to the air handler to find my C wire. The second thermostat doesnt seem to be wired as simply as you can tell by the photos below hopefully.
I think my C wire is black and hiding behind the thermostats housing, any confirmation on that would be great:)
I can see that my R terminal and my O terminal both have 2 wires in the connection to the board. I also notice in the pic of the current thermostat, that the red wire is split and going to an RH and RC connector. I didnt have that on the first thermostat, so Im wondering what to make of all this?
Some other things of note that I dont understand in the pic of the thermostat as well:
I dont have any kind of gas heat for anything, not water, not anything but it looks like a yellow and blue wire go into that contact on the thermostat.
The white wire runs to a contact thats labeled electric and while the unit is run by electricity, Im not sure what that one is for.
Lastly, that green wire runs to nothing.
I would appreciate any help anyone can give me as to why some of these contacts have dual wires running into them as well as what goes on with the gas/electric portion as well as the green wire, of that thermostat.
Thanks very much in advance!